Ammonia test cost in Portland, OR
In Portland-Vancouver-Hillsboro, OR-WA, 16 hospitals list a cash price for ammonia blood test: from $24.08 to $195.00, with a median of $98.25. The lowest listed price is at Legacy Salmon Creek Medical Center — $74.17 less than the median here. Across Oregon, the median is $87.10 at 47 hospitals.
Cash prices at 16 facilities across 9 cities for code 82140, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 23, 2026 and Apr 1, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Portland-Vancouver-Hillsboro, OR-WA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Legacy Salmon Creek Medical Center lowest Vancouver, WA · (360) 487-1000 HC AMMONIA | $24.08 | $37.04 | — | 35% | Apr 1, 2026 source file |
| Kaiser Foundation Hospital - Westside Hillsboro, OR · (971) 310-0100 ASSAY OF AMMONIA | $58.65 | $69.00 | $18.00–$56.88 | 15% | — source file |
| Kaiser Sunnyside Medical Center Clackamas, OR · (503) 652-2880 ASSAY OF AMMONIA | $58.65 | $69.00 | $18.00–$56.88 | 15% | — source file |
| Oregon Health & Science University Portland, OR · (503) 494-9000 Ammonia | $60.45 | $93.00 | $11.66–$93.00 | 35% | Mar 23, 2026 source file |
| Hillsboro Medical Center Hillsboro, OR · (503) 681-1111 Ammonia | $60.45 | $93.00 | $11.36–$93.00 | 35% | — source file |
| Providence Portland Medical Center Portland, OR · (503) 215-1111 HC ASSAY OF AMMONIA LAB | $98.25 | $131.00 | — | 25% | Apr 1, 2026 source file |
| Providence Willamette Falls Medical Center Oregon City, OR · (503) 656-1631 HC ASSAY OF AMMONIA LAB | $98.25 | $131.00 | — | 25% | Apr 1, 2026 source file |
| Providence St Vincent Medical Center Portland, OR · (503) 216-1234 HC ASSAY OF AMMONIA LAB | $98.25 | $131.00 | — | 25% | Apr 1, 2026 source file |
| Providence Milwaukie Hospital Milwaukie, OR · (503) 513-8300 HC ASSAY OF AMMONIA LAB | $98.25 | $131.00 | — | 25% | Apr 1, 2026 source file |
| Providence Newberg Medical Center Newberg, OR · (503) 537-1555 HC ASSAY OF AMMONIA LAB | $98.25 | $131.00 | — | 25% | Apr 1, 2026 source file |
| Shriners Childrens - Portland Portland, OR · (541) 241-5090 ASSAY OF AMMONIA | $132.70 | $132.70 | $11.66–$51.00 | — | — source file |
| Legacy Emanuel Medical Center Portland, OR · (503) 413-2200 HC AMMONIA | $190.45 | $293.00 | — | 35% | Apr 1, 2026 source file |
| Legacy Emanuel Medical Center Portland, OR · (503) 413-2200 HC AMMONIA | $190.45 | $293.00 | — | 35% | Apr 1, 2026 source file |
| Legacy Good Samaritan Medical Center Portland, OR · (503) 413-7682 HC AMMONIA | $190.45 | $293.00 | — | 35% | Apr 1, 2026 source file |
| Legacy Mount Hood Medical Center Gresham, OR · (503) 674-1122 HC AMMONIA | $190.45 | $293.00 | — | 35% | Apr 1, 2026 source file |
| Legacy Meridian Park Medical Center Tualatin, OR · (503) 692-1212 HC AMMONIA | $190.45 | $293.00 | — | 35% | Apr 1, 2026 source file |
| PeaceHealth Southwest Medical Center Vancouver, WA · (360) 256-2000 AMMONIA LEVEL | $195.00 | $300.00 | $5.83–$47.27 | 35% | — source file |
| PeaceHealth Southwest Medical Center Vancouver, WA · (360) 256-2000 ASSAY OF AMMONIA | $200.85 | $309.00 | $5.83–$47.27 | 35% | — source file |
Outpatient: lowest $24.08, median $98.25, highest $195.00 — a 8.1× difference within the same market.
As an inpatient, the same code is billed by 12 facilities here, median $98.25. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 2 of 6 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it below every plan's rate. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
An ammonia test measures ammonia in the blood. It is used for confusion or drowsiness in people with liver disease and for some rare inherited disorders in newborns.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.